first off i want to say im so happy with my 500gb seagate momentus 7200.4. i even exchanged it for a hitachi 7k500 but when i got the hitachi i noticed a significant battery loss, a slightly louder whooshing sound all of the time, and hotter temps than my seagate. everyone convinced me to get the hitachi, but after having both i switched right back to the seagate for obvious reasons. this seagate has been working excellent, very quite, no noticeable drop in battery, and it's fast as hell. 19-21 sec boot time here. but anyways, if you get a new hard drive, i recommend you install hdapm to keep your load cycle down and to avoid clicks if you have them. if you install smart utility and check your load cycle count, you will probably notice your load cycle count of your hard drive is close to 10k after about a month. that is just too high. hdapm keeps your load cycle way down. my first seagate was up to 10k after 3-4 weeks, as well as the hitachi. iv installed hdapm on this hard drive and im at 245 load cycle count after 3-4 weeks. which is great considering the drives are supposed to be good until 600k. if you have trouble installing it i can help you. i had trouble as well but i have a method that works. i took multiple tutorials people had written and had to use a few steps from each. i have provided the instructions on how to install hdapm below.